Add Permission.check()

Author: colemancda

Sources/AndroidManifest/PermissionCheck.swift

@@ -0,0 +1,66 @@
+//
+//  Permission+Check.swift
+//  AndroidKit
+//
+//  Created by Alsey Coleman Miller on 2/26/26.
+//
+
+#if os(Android)
+import Android
+import AndroidNDK
+#elseif canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
+import Glibc
+#endif
+import SystemPackage
+
+public extension Permission {
+
+    /// Result of `APermissionManager_checkPermission`.
+    enum CheckStatus: Sendable, Equatable {
+        /// Permission is granted (`0`).
+        case granted
+        /// Permission is denied (`-1`).
+        case denied
+        /// Any other platform-specific status code.
+        case unknown(Int32)
+    }
+}
+
+public extension Permission {
+    
+    /// Checks this permission for a specific process/user pair using
+    /// `APermissionManager_checkPermission`.
+    ///
+    /// - Parameters:
+    ///   - pid: Process ID to evaluate. Defaults to the current process ID.
+    ///   - uid: User ID to evaluate. Defaults to the current user ID.
+    /// - Returns: Permission check status.
+    func check(
+        pid: pid_t = getpid(),
+        uid: uid_t = getuid()
+    ) -> CheckStatus {
+        let result: Int32
+        #if os(Android)
+        result = rawValue.withCString {
+            APermissionManager_checkPermission($0, pid, uid)
+        }
+        #else
+        result = -1
+        #endif
+        switch result {
+        case 0:
+            return .granted
+        case -1:
+            return .denied
+        default:
+            return .unknown(result)
+        }
+    }
+
+    /// Returns `true` when this permission is granted for the current process.
+    var isGranted: Bool {
+        check() == .granted
+    }
+}